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Finding the Fourth Proportional to 18,823.80, 28,238.31 and 6,347.40

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Solution

The fourth proportional to 18,823.80, 28,238.31 and 6,347.40 is: 9,521.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,823.80 : 28,238.31 = 6,347.40 : x
  2. Step 2: Convert to fraction form
    18,823.80/28,238.31 = 6,347.40/x
  3. Step 3: Cross multiply
    18,823.80x = 28,238.31 × 6,347.40
  4. Step 4: Simplify right side
    18,823.80x = 179,239,848.89
  5. Step 5: Solve for x
    x = 179,239,848.89/18,823.80
  6. Step 6: Final answer
    x = 9,521.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.